UIC class 2C+C2 Turkish class 35+35 First use 1912 | French class 230+032 Russian class 2-3-0+0-3-2 | |
Swiss class 3/5+3/5, 6/10 from 1920s | ||
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-6-0+0-6-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-6-0 ten-wheeler locomotives operating back to back, with the boiler and cab suspended between the two swivelling power units. Each power unit has two pairs of leading wheels in a leading bogie, followed by three coupled pairs of driving wheels and no trailing wheels.
A similar wheel arrangement exists for Mallet type locomotives, but is referred to as 4-6-6-4. On a Mallet locomotive, only the front engine unit swivels while the rear unit is rigid in relation to the main frame.
Overview
This was a rare wheel arrangement for Garratt locomotives, with only seven locomotives built for two South American customers.